switch_root

SWITCH_ROOT(8)               System Administration              SWITCH_ROOT(8)

NAME
       switch_root  -  switch  to  another filesystem as the root of the mount
       tree

SYNOPSIS
       switch_root [-hV]

       switch_root newroot init [arg...]

DESCRIPTION
       switch_root moves already mounted /proc, /dev, /sys and /run to newroot
       and makes newroot the new root filesystem and starts init process.

       WARNING:  switch_root  removes recursively all files and directories on
       the current root filesystem.

OPTIONS
       -h, --help
              Display help text and exit.

       -V, --version
              Display version information and exit.

RETURN VALUE
       switch_root returns 0 on success and 1 on failure.

NOTES
       switch_root will fail to function if newroot  is  not  the  root  of  a
       mount.  If  you want to switch root into a directory that does not meet
       this requirement then you can first use a bind-mounting trick  to  turn
       any directory into a mount point:

              mount --bind $DIR $DIR

SEE ALSO
       chroot(2), init(8), mkinitrd(8), mount(8)

AUTHORS
       Peter Jones <pjones@redhat.com>
       Jeremy Katz <katzj@redhat.com>
       Karel Zak <kzak@redhat.com>

AVAILABILITY
       The switch_root command is part of the util-linux package and is avail-
       able from https://www.kernel.org/pub/linux/utils/util-linux/.

util-linux                         June 2009                    SWITCH_ROOT(8)